Animal cells lack a cell wall and instead have a cell membrane. They have lysosomes and ribosomes, and a nuclear membrane surrounds their nucleus. Accordingly, the first description;
- Cell membrane present;
- ribosomes present;
- lysosomes present;
- nuclear membrane present.
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What is lysosome?
Every eukaryotic cell contains lysosomes, which are membrane-bound organelles. They are well-known as terminal catabolic stations that eliminate waste from cells and scavenge metabolic raw materials to maintain vital biosynthetic reactions under starvation.
Matches with ANIMAL cell
On the other hand, plant cells feature a structure known as a cell wall that is more stiff than cell membranes. Large vacuoles are a characteristic of plant cells. Additionally, they have a nuclear membrane covering their nucleus. The following explanation:
- Cell wall present
- Ribosomes present
- Nucleus present
- Large vacuole present
Matches with PLANT
Viruses do not have any membrane on its wall nor its nucleus. Basically, they have no internal structures. The fourth and last description:
- Reproduces inside of a cell
- Nucleus absent
- RNA present
Matches with VIRUS
Prokaryotes are simple cells that do contain a cell wall, but because they lack a clearly defined nucleus, they also lack a nuclear membrane. The subsequent explanation:
- Cell wall present
- Ribosomes present
- Nuclear membrane absent
Matches with PROKARYOTE
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Answer:
2000 ants per square meters.
Explanation:
The population density, D, of a population can be calculated by dividing the total number of individuals by the area covered by that population. That is;
D = N/A
Where;
D = population density
N = population of individual organism
A = area covered (m²)
According to this question, a population of 6000 ants lives inside a dead log that measures 3 square meters. Hence, N = 6000 ants, and A = 3m²
Therefore, the population density (D) = 6000/3
= 2000
The population density is 2000 ants/square meter.
Answer:
Forces have a magnitude (strength) and a direction. Forces can be represented as arrows with the length of the arrow representing the magnitude of the force and the head of the arrow pointing in the direction of the force. Using such arrows, the resulting force (net force) and direction can be determined.
Forces acting on an object can be balanced or unbalanced.
Answer: true
Explanation: This is because the outer planets are in a gaseous state while the inner planets are solid and more compact. Consequently, the density of the inner planets is greater than that of the outer planets. Despite the density differences, the mass is smaller for the inner planets than the outer planets.
